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| n | a(n) |
|---|---|
| 1 | 1948 |
| 2 | 5610 |
| 3 | 25220 |
| 4 | 126936 |
| 5 | 664938 |
| 6 | 3510697 |
| 7 | 18508976 |
| 8 | 97654871 |
| 9 | 516198206 |
| 10 | 2730269271 |
| 11 | 14438548815 |
| 12 | 76352728286 |
| 13 | 403819220427 |
| 14 | 2135971374401 |
| 15 | 11298053010693 |
| 16 | 59758367276460 |
| 17 | 316078378288805 |
| 18 | 1671854651231981 |
[1948,5610,25220,126936,664938,3510697,18508976, 97654871,516198206,2730269271,14438548815, 76352728286,403819220427,2135971374401, 11298053010693,59758367276460,316078378288805, 1671854651231981] |